<template>
  <div class="xtx-cart-page">
    <div class="container m-top-20">
      <div class="cart">
        <table>
          <thead>
            <tr>
              <th width="120"><XtxCheckbox :model-value="isAll" @change="allCheck">全选</XtxCheckbox></th>
              <th width="400">商品信息</th>
              <th width="220">单价</th>
              <th width="180">数量</th>
              <th width="180">小计</th>
              <th width="140">操作</th>
            </tr>
          </thead>
          <!-- 有效商品 -->
          <tbody>
            <tr v-for="i in cartList" :key="i.id">
              <td><XtxCheckbox :model-value="i.selected" @change="(selected)=>checkChange(i, selected)" /></td>
              <td>
                <div class="goods">
                  <RouterLink to="/"><img :src="i.picture" alt=""></RouterLink>
                  <div>
                    <p class="name ellipsis">{{i.name}}</p>
                    <!-- 选择规格组件 -->
                  </div>
                </div>
              </td>
              <td class="tc">
                <p>&yen;{{i.price}}</p>
                <p>比加入时降价 <span class="red">&yen;{{i.nowPrice - i.nowOriginalPrice}}</span></p>
              </td>
              <td class="tc">
                <!-- 数量组件 -->
                <XtxNumbox :is-label="false" :min="0" :modelValue="i.count" @change="(count) => changeNumber(i, count)" />
              </td>
              <td class="tc"><p class="f16 red">&yen;{{i.nowPrice * i.count}}</p></td>
              <td class="tc">
                <p><a class="green" href="javascript:;" @click="deleteCart(i.skuId)">删除</a></p>
              </td>
            </tr>
          </tbody>
        </table>
      </div>
      <!-- 操作栏 -->
      <div class="action">
        <div class="batch">
          共 {{allCount}} 件商品，已选择 {{selectedCount}} 件，商品合计：
          <span class="red">¥{{ totalPrice.toFixed(2) }}</span>
        </div>
        <div class="total">
          <XtxButton type="primary" @click="goSettlement">下单结算</XtxButton>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import { computed } from 'vue'
import { useStore } from 'vuex'
import { Message } from '@/components/Message'
import { useRouter } from 'vue-router'

export default {
  name: 'XtxCartPage',
  setup () {
    const store = useStore()
    const router = useRouter()
    const cartList = computed(() => store.state.cart.cartList)
    const isAll = computed(() => store.getters['cart/isAll'])
    const allCount = computed(() => store.getters['cart/allCount'])
    const selectedCount = computed(() => store.getters['cart/selectedCount'])
    const totalPrice = computed(() => store.getters['cart/totalPrice'])
    const token = computed(() => store.state.user.profile.token)
    // console.log(cartList.value)

    // 单选切换
    function checkChange (curItem, selected) {
      // 把最新的状态通过走mutation函数 对vuex中的state中对应的数据进行修改
      // 需要找到对应的项找到然后进行修改。1.拿到最新的选中状态。2.需要一个用来识别要修改谁的数据(i代表当前的那一项)
      // curItem -> skuId, selected
      // console.log(curItem)
      // store.commit('cart/singleCheck', { skuId: curItem.skuId, selected })
      store.dispatch('cart/singleCheck', {
        skuId: curItem.skuId,
        count: curItem.count,
        selected
      })
    }

    // 数量
    function changeNumber (curItem, count) {
      store.dispatch('cart/changeNumber', {
        skuId: curItem.skuId,
        selected: curItem.selected,
        count
      })
    }

    // 全选
    function allCheck (selected) {
      store.dispatch('cart/allCheck', selected)
    }

    // 删除
    function deleteCart (skuId) {
      store.dispatch('cart/delCart', [skuId])
      Message({ type: 'success', text: '删除商品成功' })
    }

    // 下单结算
    function goSettlement () {
      if (!token.value) {
        return Message({ type: 'warn', text: '请先登录' })
      } else if (selectedCount.value === 0) {
        return Message({ type: 'warn', text: '请至少选择一件商品' })
      } else {
        router.push('/settlement')
      }
    }

    return {
      cartList,
      checkChange,
      allCheck,
      isAll,
      allCount,
      selectedCount,
      totalPrice,
      deleteCart,
      goSettlement,
      changeNumber
    }
  }
}
</script>

<style scoped lang="less">
.tc {
  text-align: center;
  .xtx-numbox {
    margin: 0 auto;
    width: 120px;
  }
}
.red {
  color: @priceColor;
}
.green {
  color: @xtxColor
}
.f16 {
  font-size: 16px;
}
.goods {
  display: flex;
  align-items: center;
  img {
    width: 100px;
    height: 100px;
  }
  > div {
    width: 280px;
    font-size: 16px;
    padding-left: 10px;
    .attr {
      font-size: 14px;
      color: #999;
    }
  }
}
.action {
  display: flex;
  background: #fff;
  margin-top: 20px;
  height: 80px;
  align-items: center;
  font-size: 16px;
  justify-content: space-between;
  padding: 0 30px;
  .xtx-checkbox {
    color: #999;
  }
  .batch {
    a {
      margin-left: 20px;
    }
  }
  .red {
    font-size: 18px;
    margin-right: 20px;
    font-weight: bold;
  }
}
.tit {
  color: #666;
  font-size: 16px;
  font-weight: normal;
  line-height: 50px;
}
.xtx-cart-page {
  .cart {
    background: #fff;
    color: #666;
    table {
      border-spacing: 0;
      border-collapse: collapse;
      line-height: 24px;
      th,td{
        padding: 10px;
        border-bottom: 1px solid #f5f5f5;
        &:first-child {
          text-align: left;
          padding-left: 30px;
          color: #999;
        }
      }
      th {
        font-size: 16px;
        font-weight: normal;
        line-height: 50px;
      }
    }
  }
}
</style>
